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4 years ago

How does -2x + x equal -x ?

Mathematics

2 answers:

finlep [7]4 years ago

8 0

Answer:

Step-by-step explanation:

-2x + x could also be written as x - 2x, which is x(1 - 2), or -x. Here we can rearrange the terms as we wish (commutative property).

shepuryov [24]4 years ago

5 0

Answer:

See below.

Step-by-step explanation:

$-2x+x=-x$

because we combine like terms. You will essentially ignore the x and just do -2 + 1, which is -1. So, the answer would be -1x which is simply just -x.

To see why we can combine like terms, use the distributive property. So we have:

$-2x+x$

This is the same thing as saying:

$=(-2)x+(1)x$

Factor out the x:

$=x(-2+1)$

Add:

$=x(-1)$

And simplify:

$=-1x\\=-x$

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Answer:

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3 years ago

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Step-by-step explanation:

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3 years ago

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Pani-rosa [81]

Solution: We have to find the Frequency and Relative frequency of the given data:

Frequency is the number of times a number occurs.

Relative Frequency is the number of times a number occurs divided by the total number of items.

Therefore, the frequency and relative frequency are calculated as below:

Number Frequency Relative Frequency

20 1 $\frac{1}{31} \times 100 =3.2\%$

21 4 $\frac{4}{31} \times 100 =12.9\%$

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3 years ago

Need help with this question please help

Bess [88]

If you look closely the area where 3x is congruent to the other side of the 90 degree angle with one part as 0.5x + 34

So
3x + 0.5x + 34= 90

x will be 16

So plug it in

0.5(16) + 34= 42 degrees

And

3(16)= 48 degrees

That left half of the circle is 180 degrees and since we know the angle 3x is 48 degrees we subtract it from 180 to get angle AE

180-48

132 degrees is your answer

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4 years ago